html,body{
    width: 100%;
    height: 100%;
}
h1{
    width: 800px;
    text-align: center;
    margin: 0 auto;
}
.parent{
    width: 800;
    height: auto;
    margin: 0 auto;
}
.full-img{
    width: 800px;
    height: auto;
    
    margin: 0 auto;

}
.displayed-img{
    width: 800px;
    height: 400px;
    margin: 0 auto;

}
.overlay{
    position:absolute;
    top: 49px;
    margin: 0 auto;
    width: 800px;
    height: 400px;
    

}

.thumb-bar{
    margin: 0 auto;
    width: 800px;
    height: auto;
    /* border: 1px solid red; */
}
.left{
    border-radius: 50%;
    position:absolute;
    text-align: center;
    text-decoration:none;
    left: 15%;
    font-size: 50px;
    top: 28%;
    background-color: black;
    opacity: 0.3;
    height: 70px;
    width: 70px;
    line-height: 70px;
}
.right{
    border-radius: 50%;
    position:absolute;
    text-decoration:none;
    top: 28%;
    right: 15%;
    text-align: center;
    font-size: 50px;
    background-color: black;
    opacity: 0.3;
    height: 70px;
    width: 70px;
    line-height: 70px;
}
.right:hover{
    background-color: orange;
    color: cadetblue
}
.left:hover{
    background-color: orange;
    color: cadetblue
}